Device to prevent rotation of bobbins



R. G. TURNER DEVICE TO PREVENT ROTATION OF BOBBINS Jul 13, 1926.

Filed Oct. 25, 1924 u uLiu u Patented July 13, 1926.

UNITED STATES PATENT OFFICE.

RICHARD GREENLEAF TURNER, OF VJGlR-CESTER, ISIASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOllI VJ'QIt-KS, OF WORCESTER, MASSACHUSETTS, A GOR- PORATION OF MASSACHUSETTS.

DEVICE TO PREVENT ROTATION GF ROBBINS.

Application filed October 23, 1924.

This invention relates to weft replenishing mechanism of the multi-color type and more particularly to improved means for preventing rotation of the bobbins in such devices as they await transfer.

In my co-pending application Ser. No. 743,204 I have shown a multi-color weft replenishing mechanism provided with a plurality of weights located in the bobbin com partments and held in raised position while the operator is replenishing the mechanism. In the mechanism therein disclosed the weights are held against displacement by separate strips of sheet metal which are spaced sufficiently from the flanges of the replenishing mechanism frame tov define grooves or guides into which extend fins formed on the weights. Because of this arrangement it is necessary to make the weights both right and left hand and the guide strips are found to collect lint.

It is the principal object of my present invention to improve upon the method for guiding the weights and the construction of the weights themselves. A further object of the invention is to provide a replenishing mechanism formed with stops to limit the vertical motion of the weights to prevent loss of the same and also to prevent interference with the bobbin discharge devices located at the bottom of each compartment.

lVith these and other objecm in View which will appear as the description proceeds, my invention resides in the combination and arrangementof parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein I have shown one form of my invention applied to a six color weft replenishing mechanism,

Fig. 1 is an end elevation of a replenishing mechanism having my invention applied thereto and having the outside plate removed to show more clearly the compartments or guideways for the butts of the bobbins,

Fig. 2 is a rear elevation of a portion of the mechanism shown in Fig. 1 looking in the direction of arrow 2, Fig. 1,

Fig. 3 is a top plan view of part of the mechanism shown in Fig. 1,

Serial No. 745,503.

Fig. 4 is a fragmentary section taken on line 44 of Fig. 1 and showing the construction of one of the compartments and the weight associated therewith, and

Fig. 5 is a perspective view of one of the weights.

Referring to the drawings it will be seen that I have provided a replenishing mechanism with a stand or foot and a frame 11 from which extend a plurality of flanges 12 which define bobbin compartments or guideways 13. A shaft 14 is mounted for angular motion in the frame 11 and has secured thereto a bar 15 by means of which it is given an angular motion just prior to transfer to raise the transferrer latch shown).

Extending across the flanges 12- and closing the upper ends of compartments 13 is a sliding plate having slots 21 therein which receive guide studs 22 secured in the frame 11. The forward end of the slide has a depending arm 23 which is pressed forwardly by a compression spring 24 received in a pocket 25 formed in the frame 11. The rear end of the slide is provided with a slot 26 which receives the upper end 27 of a lever 28 pivoted as at 29 to the frame 11. A set screw 30 is secured in arm 27 and is positioned for engagement with the frame 11, the spring 24 holding the lever in its forward position. lever 28 is provided with a cam face 82 which lies in the path of a lever 33' fastened to shaft 14.

As shown in Fig. 3 the slide 20 is provided with a series of transverse slots 34 through which extend spring weight retainers 35 each of which is held to the slide by a screw 36 and has a depending offset end 37 with an inclined portion 38. The matter thus far described is substantially the same as set forth in my aforesaid co-pending ap plication.

In carrying out my present improvements I form a plurality of recesses or slots 40 in the frame 11, each of the bobbin compartments communicating with one of the recesses. Each compartment is provided with a shelf 41 to which is secured a metal plate 42, one edge of which extends over without (not The lower' end 31 of the covering the recess 40. Each compartment is also provided with a second shelf 43 which lies substantially in the same plane as the outer face of plate 42 to form an interior wall to guide the large ends of the bobbins.

The guidevays are provided. with weights 44 each of which has formed therewith an outwardly extending handle 45 and an inwardly extending tongue 46 formed with a head 47 normally extending into that part of the recess behind the metal plate 42. The upper part of each weight is provided with a recess 48 into which projects an overhang 49 proportioned to receive the bent end 37 of the corresponding spring 35.

In the normal operation of the replenish ing mechanism the weights 44 will rest on the uppermost bobbins and when the operator desires to replenish the mechanism the weights will be. lifted so that the end 37' of spring 35 can pass under the overhang 49 and thus retain the weight in raised posi-' tion. After all of the compartments have been replenished the operator may move the slide 20 rearwardly against the action of siring 24, the result of which will be to nove all of the springs away from the weights and release the latter. Plates 42 serve to hold the weights in place while permitting them to move freely in a vertical direction. In order to limit downward motion of the weights I provide the frame 11 with a flange 50 which lies substantially in the plane of the outer face of plate 42 and is a continuation of shelf 43. The lower end of the tongue 46 will engage the flange 50 and thus limit downward movement of the weights to keep them above the cradles or bobbin releasing devices 51. hen it is desired to remove the weights screws 52 which hold the plates 42 in place may be removed and the plate withdrawn, thus releasing the weights. 7

Should the operator neglect to move the slide 20 the latter will be moved against the action of spring 24 on the next indication for transfer which is given the replenishing nechanism. At such times the shaft 14 is given a partial rotation in such a direction as to move lever 83 across cam 32 and move lever :28 to give the slide a weight releasing movement.

From the foregoing it will be seen that I have provided a simple and convenient means for holding the bobbin restraining weights, said means being readily detachable to permit the removal of the weights and being at all times out of the path of the bobbins. It will be further noted that the frame has been so constructed as to render impossible the falling of the weights upon the bobbin releasing mechanisms and that said weights are the same for all compartments. I

Having thus described my invention it will be apparent that changes and modifications maybe made therein without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing mechanism for looms, a frame, a pair of flanges extending therefrom to define a bobbin compartment, the frame being provided with an elongated recess substantially parallel to the flanges and communicating with the compartment, a removable plate secured to the frame intermediate the flanges and having a portion thereof overhanging the recess, a weight slidable between the flanges, and a tongue projecting from the weight into the recess and having a head for engagement with the plate.

2. A bobbin restraining element for a weft replenishing mechanism having a bobbin compartment with a groove and a yieldable holding device for the restraining element, said element having a weighted por- A tion and a tongue extending therefrom and formed to define with the weighted portion an open slot, said tongue extending into the groove of the compartment and said slot receiving a portion of the compartment walls to restrain transverse motion of the weighted element, said element having a projecting overhang to engage said yield able holding device.

In testimony whereof I have hereunto affixedmy signature.

RICHARD GREENLEA 4 TURNER. 

